JPS5650744A - Closed forging method making use of double-acting press - Google Patents

Closed forging method making use of double-acting press

Info

Publication number
JPS5650744A
JPS5650744A JP12676479A JP12676479A JPS5650744A JP S5650744 A JPS5650744 A JP S5650744A JP 12676479 A JP12676479 A JP 12676479A JP 12676479 A JP12676479 A JP 12676479A JP S5650744 A JPS5650744 A JP S5650744A
Authority
JP
Japan
Prior art keywords
punches
punch holes
spacers
blank
faces
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
JP12676479A
Other languages
Japanese (ja)
Inventor
Hiyoji Yoshimura
Sadamu Shimazaki
Terushige Nakamura
Kazuhiko Oshiumi
Original Assignee
Mitsubishi Heavy Ind Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Mitsubishi Heavy Ind Ltd filed Critical Mitsubishi Heavy Ind Ltd
Priority to JP12676479A priority Critical patent/JPS5650744A/en
Publication of JPS5650744A publication Critical patent/JPS5650744A/en
Pending legal-status Critical Current

Links

Abstract

PURPOSE: To thinly form the excess metal parts of the punch holes where no piping defects are produced, by interposing members for controlling the depth of the punch holes between the end faces of the upper and lower outer punches of a double-acting press and the end faces of the circumferential edge parts in the large diameter parts of the upper and lower inner punches.
CONSTITUTION: Spacers 20 which control the depth of the punch holes of a blank material are interposed between the end faces of the outer punches 13, 13' on the inner side of upper, lower dies 14, 15, and the end faces in the circumferential parts of the large-diameter parts 10 of inner punches 12, 12'. The spacers 20 are movable in the radial direction by fluid pressure cylinders 21. A blank material is inserted into the lower die 15, and is closed with the upper die 14. With the spacers 20 held inserted, the blank material is pressed by the upper and lower inner, outer punches 12, 12', 13, 13' to form the punch holes of thick excess metal. The pressing is then stopped and the spacers 20 are moved to the outer side, thence the upper and lower inner punches 12, 12' are pushed in. Thereby, the blank material is extruded in the height direction and the outer punches 13, 13' retreat and stop at the under surfaces in the large-diameter parts, thus the punch holes become thin and no piping defects are produced.
COPYRIGHT: (C)1981,JPO&Japio
JP12676479A 1979-10-03 1979-10-03 Closed forging method making use of double-acting press Pending JPS5650744A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP12676479A JPS5650744A (en) 1979-10-03 1979-10-03 Closed forging method making use of double-acting press

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP12676479A JPS5650744A (en) 1979-10-03 1979-10-03 Closed forging method making use of double-acting press

Publications (1)

Publication Number Publication Date
JPS5650744A true JPS5650744A (en) 1981-05-08

Family

ID=14943339

Family Applications (1)

Application Number Title Priority Date Filing Date
JP12676479A Pending JPS5650744A (en) 1979-10-03 1979-10-03 Closed forging method making use of double-acting press

Country Status (1)

Country Link
JP (1) JPS5650744A (en)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58112626A (en) * 1981-12-26 1983-07-05 Musashi Seimitsu Kogyo Kk Cold forging method for tie rod end housing by transfer press
JPS60170646A (en) * 1984-02-16 1985-09-04 Daicel Chem Ind Ltd Resin composition
JPS6173753A (en) * 1984-09-20 1986-04-15 Toray Ind Inc Resin composition
JPS6397653A (en) * 1986-10-14 1988-04-28 Toray Ind Inc Thermoplastic resin composition
CN103128211A (en) * 2013-03-14 2013-06-05 江苏森威集团飞达股份有限公司 Blocked internal extrusion molding device and molding technology
WO2015146879A1 (en) * 2014-03-28 2015-10-01 Ntn株式会社 Closed forging method for universal joint trunnion and universal joint trunnion

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58112626A (en) * 1981-12-26 1983-07-05 Musashi Seimitsu Kogyo Kk Cold forging method for tie rod end housing by transfer press
JPH0252577B2 (en) * 1981-12-26 1990-11-14 Musashi Seimitsu Kogyo Kk
JPS60170646A (en) * 1984-02-16 1985-09-04 Daicel Chem Ind Ltd Resin composition
JPS6173753A (en) * 1984-09-20 1986-04-15 Toray Ind Inc Resin composition
JPH0558022B2 (en) * 1984-09-20 1993-08-25 Toray Industries
JPS6397653A (en) * 1986-10-14 1988-04-28 Toray Ind Inc Thermoplastic resin composition
JPH072885B2 (en) * 1986-10-14 1995-01-18 東レ株式会社 Thermoplastic resin composition
CN103128211A (en) * 2013-03-14 2013-06-05 江苏森威集团飞达股份有限公司 Blocked internal extrusion molding device and molding technology
WO2015146879A1 (en) * 2014-03-28 2015-10-01 Ntn株式会社 Closed forging method for universal joint trunnion and universal joint trunnion
JP2015193044A (en) * 2014-03-28 2015-11-05 Ntn株式会社 Block forging method of trunnion for universal joint and trunnion for universal joint

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